Re: [DML] Oil Sending Unit

[fjk143@xxxx]

>From a technical perspective, Teflon has a high concentration of chorlides in 
it, which can help induce stress corrosion cracking (a bad thing). I doubt 
if that would be much of a concern in any automobile system, but in any 
system of high stress (thernal, especially) you will find that halogens are 
prohibited for that reason. Come to think of it though, I would not use a 
anti-sieze compound that has a halogen derivative component (chlorine, 
bromine, etc) on intake/exhaust manifold bolts/studs or any other fastening 
device internal of the engine. The stainless steels are especially 
susceptible to halogen-induced stress corrosion cracking (SSC). Has anyone 
had an exhaust manifold bolt head twist off while removing? The failure 
mechanism could very well be SSC not simply the surface rust that you see. 
DO NOT count on NAPA, PEP BOYS, etc to sell only the compounds that do not 
have halogens - check for yourself to be safe. I seem to recall one of the 
Nevr-Seez products was halogen free, but not all - so be careful for long 
term's sake.

Fred
6894